For me personally... I use VyOS in a VM running on a proxmox host (optiplex, SFF) with a 4-port NIC passthrough. This solves the issue of power for me, as the host has plenty of ram allowing me to run other services without needing an additional machine (although I do have one as a spare). VyOS doesn't currently have a GUI (one is in development), however, it has been very solid for me (also based on debian, which is nice).